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Diffstat (limited to 'xlators/cluster/stripe/src/stripe.c')
| -rw-r--r-- | xlators/cluster/stripe/src/stripe.c | 3286 |
1 files changed, 3286 insertions, 0 deletions
diff --git a/xlators/cluster/stripe/src/stripe.c b/xlators/cluster/stripe/src/stripe.c new file mode 100644 index 00000000000..83787ca2a96 --- /dev/null +++ b/xlators/cluster/stripe/src/stripe.c @@ -0,0 +1,3286 @@ +/* + Copyright (c) 2007, 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +/** + * xlators/cluster/stripe: + * Stripe translator, stripes the data accross its child nodes, + * as per the options given in the volfile. The striping works + * fairly simple. It writes files at different offset as per + * calculation. So, 'ls -l' output at the real posix level will + * show file size bigger than the actual size. But when one does + * 'df' or 'du <file>', real size of the file on the server is shown. + * + * WARNING: + * Stripe translator can't regenerate data if a child node gets disconnected. + * So, no 'self-heal' for stripe. Hence the advice, use stripe only when its + * very much necessary, or else, use it in combination with AFR, to have a + * backup copy. + */ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "xlator.h" +#include "logging.h" +#include "defaults.h" +#include "compat.h" +#include "compat-errno.h" +#include <fnmatch.h> +#include <signal.h> + +#define STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR(_loc) do { \ + if (!(_loc && _loc->inode)) { \ + STACK_UNWIND (frame, -1, EINVAL, NULL, NULL, NULL); \ + return 0; \ + } \ +} while(0) + +/** + * struct stripe_options : This keeps the pattern and the block-size + * information, which is used for striping on a file. + */ +struct stripe_options { + struct stripe_options *next; + char path_pattern[256]; + uint64_t block_size; +}; + +/** + * Private structure for stripe translator + */ +struct stripe_private { + struct stripe_options *pattern; + xlator_t **xl_array; + uint64_t block_size; + gf_lock_t lock; + uint8_t nodes_down; + int8_t first_child_down; + int8_t child_count; + int8_t state[256]; /* Current state of the child node, + 0 for down, 1 for up */ + gf_boolean_t xattr_supported; /* 0 for no, 1 for yes, default yes */ +}; + +/** + * Used to keep info about the replies received from fops->readv calls + */ +struct readv_replies { + struct iovec *vector; + int32_t count; //count of vector + int32_t op_ret; //op_ret of readv + int32_t op_errno; + struct stat stbuf; /* 'stbuf' is also a part of reply */ +}; + +/** + * Local structure to be passed with all the frames in case of STACK_WIND + */ +struct stripe_local; /* this itself is used inside the structure; */ + +struct stripe_local { + struct stripe_local *next; + call_frame_t *orig_frame; + + /* Used by _cbk functions */ + struct stat stbuf; + struct readv_replies *replies; + struct statvfs statvfs_buf; + dir_entry_t *entry; + struct xlator_stats stats; + + int8_t revalidate; + int8_t failed; + int8_t unwind; + + int32_t node_index; + int32_t call_count; + int32_t wind_count; /* used instead of child_cound + in case of read and write */ + int32_t op_ret; + int32_t op_errno; + int32_t count; + int32_t flags; + char *name; + inode_t *inode; + + loc_t loc; + loc_t loc2; + + /* For File I/O fops */ + dict_t *dict; + + /* General usage */ + off_t offset; + off_t stripe_size; + + int8_t *list; + struct flock lock; + fd_t *fd; + void *value; +}; + +typedef struct stripe_local stripe_local_t; +typedef struct stripe_private stripe_private_t; + +/** + * stripe_get_matching_bs - Get the matching block size for the given path. + */ +int32_t +stripe_get_matching_bs (const char *path, + struct stripe_options *opts, + uint64_t default_bs) +{ + struct stripe_options *trav = NULL; + char *pathname = NULL; + uint64_t block_size = 0; + + block_size = default_bs; + pathname = strdup (path); + trav = opts; + + while (trav) { + if (fnmatch (trav->path_pattern, + pathname, FNM_NOESCAPE) == 0) { + block_size = trav->block_size; + break; + } + trav = trav->next; + } + free (pathname); + + return block_size; +} + + +/* + * stripe_common_cbk - + */ +int32_t +stripe_common_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + +/** + * stripe_stack_unwind_cbk - This function is used for all the _cbk without + * any extra arguments (other than the minimum given) + * This is called from functions like fsync,unlink,rmdir etc. + * + */ +int32_t +stripe_stack_unwind_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_errno = op_errno; + if (op_errno == ENOTCONN) + local->failed = 1; + } + if (op_ret >= 0) + local->op_ret = op_ret; + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->failed) + local->op_ret = -1; + + if (local->loc.path) + loc_wipe (&local->loc); + if (local->loc2.path) + loc_wipe (&local->loc2); + + STACK_UNWIND (frame, local->op_ret, local->op_errno); + } + return 0; +} + +int32_t +stripe_common_buf_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +/** + * stripe_stack_unwind_buf_cbk - This function is used for all the _cbk with + * 'struct stat *buf' as extra argument (other than minimum) + * This is called from functions like, chmod, fchmod, chown, fchown, + * truncate, ftruncate, utimens etc. + * + * @cookie - this argument should be always 'xlator_t *' of child node + */ +int32_t +stripe_stack_unwind_buf_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_errno = op_errno; + if (op_errno == ENOTCONN) + local->failed = 1; + } + + if (op_ret == 0) { + local->op_ret = 0; + if (local->stbuf.st_blksize == 0) { + local->stbuf = *buf; + /* Because st_blocks gets added again */ + local->stbuf.st_blocks = 0; + } + + if (FIRST_CHILD(this) == + ((call_frame_t *)cookie)->this) { + /* Always, pass the inode number of + first child to the above layer */ + local->stbuf.st_ino = buf->st_ino; + local->stbuf.st_mtime = buf->st_mtime; + } + + local->stbuf.st_blocks += buf->st_blocks; + if (local->stbuf.st_size < buf->st_size) + local->stbuf.st_size = buf->st_size; + if (local->stbuf.st_blksize != buf->st_blksize) { + /* TODO: add to blocks in terms of + original block size */ + } + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->failed) + local->op_ret = -1; + + if (local->loc.path) + loc_wipe (&local->loc); + if (local->loc2.path) + loc_wipe (&local->loc2); + + STACK_UNWIND (frame, local->op_ret, local->op_errno, + &local->stbuf); + } + + return 0; +} + +/* In case of symlink, mknod, the file is created on just first node */ +int32_t +stripe_common_inode_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + inode_t *inode, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, inode, buf); + return 0; +} + +/** + * stripe_stack_unwind_inode_cbk - This is called by the function like, + * link (), symlink (), mkdir (), mknod () + * This creates a inode for new inode. It keeps a list of all + * the inodes received from the child nodes. It is used while + * forwarding any fops to child nodes. + * + */ +int32_t +stripe_stack_unwind_inode_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + inode_t *inode, + struct stat *buf) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_errno = op_errno; + if (op_errno == ENOTCONN) + local->failed = 1; + } + + if (op_ret >= 0) { + local->op_ret = 0; + + if (local->stbuf.st_blksize == 0) { + local->inode = inode; + local->stbuf = *buf; + /* Because st_blocks gets added again */ + local->stbuf.st_blocks = 0; + } + if (FIRST_CHILD(this) == + ((call_frame_t *)cookie)->this) { + local->stbuf.st_ino = buf->st_ino; + local->stbuf.st_mtime = buf->st_mtime; + } + + local->stbuf.st_blocks += buf->st_blocks; + if (local->stbuf.st_size < buf->st_size) + local->stbuf.st_size = buf->st_size; + if (local->stbuf.st_blksize != buf->st_blksize) { + /* TODO: add to blocks in terms of + original block size */ + } + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->failed) + local->op_ret = -1; + + STACK_UNWIND (frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf); + } + + return 0; +} + +int32_t +stripe_stack_unwind_inode_lookup_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + inode_t *inode, + struct stat *buf, + dict_t *dict) +{ + int32_t callcnt = 0; + dict_t *tmp_dict = NULL; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + if (op_errno != ENOENT) + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_errno = op_errno; + if (op_errno == ENOTCONN) + local->failed = 1; + } + + if (op_ret >= 0) { + local->op_ret = 0; + + if (local->stbuf.st_blksize == 0) { + local->inode = inode; + local->stbuf = *buf; + /* Because st_blocks gets added again */ + local->stbuf.st_blocks = 0; + } + if (FIRST_CHILD(this) == + ((call_frame_t *)cookie)->this) { + local->stbuf.st_ino = buf->st_ino; + local->stbuf.st_mtime = buf->st_mtime; + if (local->dict) + dict_unref (local->dict); + local->dict = dict_ref (dict); + } else { + if (!local->dict) + local->dict = dict_ref (dict); + } + local->stbuf.st_blocks += buf->st_blocks; + if (local->stbuf.st_size < buf->st_size) + local->stbuf.st_size = buf->st_size; + if (local->stbuf.st_blksize != buf->st_blksize) { + /* TODO: add to blocks in terms of + original block size */ + } + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->failed) + local->op_ret = -1; + + tmp_dict = local->dict; + STACK_UNWIND (frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf, local->dict); + if (tmp_dict) + dict_unref (tmp_dict); + } + + return 0; +} + + +/** + * stripe_lookup - + */ +int32_t +stripe_lookup (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + dict_t *xattr_req) +{ + stripe_local_t *local = NULL; + xlator_list_t *trav = NULL; + stripe_private_t *priv = this->private; + char send_lookup_to_all = 0; + + if (!(loc && loc->inode)) { + gf_log (this->name, GF_LOG_ERROR, + "wrong argument, returning EINVAL"); + STACK_UNWIND (frame, -1, EINVAL, NULL, NULL, NULL); + return 0; + } + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + + if ((!loc->inode->st_mode) || + S_ISDIR (loc->inode->st_mode) || + S_ISREG (loc->inode->st_mode)) + send_lookup_to_all = 1; + + if (send_lookup_to_all) { + /* Everytime in stripe lookup, all child nodes + should be looked up */ + local->call_count = priv->child_count; + trav = this->children; + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_inode_lookup_cbk, + trav->xlator, + trav->xlator->fops->lookup, + loc, xattr_req); + trav = trav->next; + } + } else { + local->call_count = 1; + + STACK_WIND (frame, + stripe_stack_unwind_inode_lookup_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->lookup, + loc, xattr_req); + } + + return 0; +} + +/** + * stripe_stat - + */ +int32_t +stripe_stat (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + int send_lookup_to_all = 0; + xlator_list_t *trav = NULL; + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (S_ISDIR (loc->inode->st_mode) || S_ISREG (loc->inode->st_mode)) + send_lookup_to_all = 1; + + if (!send_lookup_to_all) { + STACK_WIND (frame, + stripe_common_buf_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->stat, + loc); + } else { + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = loc->inode; + local->call_count = priv->child_count; + + trav = this->children; + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->stat, + loc); + trav = trav->next; + } + } + return 0; +} + + +/** + * stripe_chmod - + */ +int32_t +stripe_chmod (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + mode_t mode) +{ + int send_fop_to_all = 0; + xlator_list_t *trav = NULL; + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, ENOTCONN, NULL); + return 0; + } + + if (S_ISDIR (loc->inode->st_mode) || S_ISREG (loc->inode->st_mode)) + send_fop_to_all = 1; + + if (!send_fop_to_all) { + STACK_WIND (frame, + stripe_common_buf_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->chmod, + loc, mode); + } else { + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = loc->inode; + local->call_count = priv->child_count; + + trav = this->children; + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->chmod, + loc, mode); + trav = trav->next; + } + } + return 0; +} + + +/** + * stripe_chown - + */ +int32_t +stripe_chown (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + uid_t uid, + gid_t gid) +{ + int send_fop_to_all = 0; + xlator_list_t *trav = NULL; + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, ENOTCONN, NULL); + return 0; + } + + if (S_ISDIR (loc->inode->st_mode) || S_ISREG (loc->inode->st_mode)) + send_fop_to_all = 1; + + trav = this->children; + if (!send_fop_to_all) { + STACK_WIND (frame, + stripe_common_buf_cbk, + trav->xlator, + trav->xlator->fops->chown, + loc, uid, gid); + } else { + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = loc->inode; + local->call_count = priv->child_count; + + trav = this->children; + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->chown, + loc, uid, gid); + trav = trav->next; + } + } + + return 0; +} + + +/** + * stripe_statfs_cbk - + */ +int32_t +stripe_statfs_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct statvfs *stbuf) +{ + stripe_local_t *local = (stripe_local_t *)frame->local; + int32_t callcnt; + LOCK(&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret != 0 && op_errno != ENOTCONN) { + local->op_errno = op_errno; + } + if (op_ret == 0) { + struct statvfs *dict_buf = &local->statvfs_buf; + dict_buf->f_bsize = stbuf->f_bsize; + dict_buf->f_frsize = stbuf->f_frsize; + dict_buf->f_blocks += stbuf->f_blocks; + dict_buf->f_bfree += stbuf->f_bfree; + dict_buf->f_bavail += stbuf->f_bavail; + dict_buf->f_files += stbuf->f_files; + dict_buf->f_ffree += stbuf->f_ffree; + dict_buf->f_favail += stbuf->f_favail; + dict_buf->f_fsid = stbuf->f_fsid; + dict_buf->f_flag = stbuf->f_flag; + dict_buf->f_namemax = stbuf->f_namemax; + local->op_ret = 0; + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + STACK_UNWIND (frame, local->op_ret, + local->op_errno, &local->statvfs_buf); + } + + return 0; +} + + +/** + * stripe_statfs - + */ +int32_t +stripe_statfs (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + stripe_local_t *local = NULL; + xlator_list_t *trav = this->children; + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + local->op_errno = ENOTCONN; + frame->local = local; + + local->call_count = ((stripe_private_t *)this->private)->child_count; + while (trav) { + STACK_WIND (frame, + stripe_statfs_cbk, + trav->xlator, + trav->xlator->fops->statfs, + loc); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_truncate - + */ +int32_t +stripe_truncate (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + off_t offset) +{ + int send_fop_to_all = 0; + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, ENOTCONN, NULL); + return 0; + } + + if (S_ISDIR (loc->inode->st_mode) || S_ISREG (loc->inode->st_mode)) + send_fop_to_all = 1; + + if (!send_fop_to_all) { + STACK_WIND (frame, + stripe_common_buf_cbk, + trav->xlator, + trav->xlator->fops->truncate, + loc, + offset); + } else { + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = loc->inode; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->truncate, + loc, + offset); + trav = trav->next; + } + } + + return 0; +} + + +/** + * stripe_utimens - + */ +int32_t +stripe_utimens (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + struct timespec tv[2]) +{ + int send_fop_to_all = 0; + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, ENOTCONN, NULL); + return 0; + } + + if (S_ISDIR (loc->inode->st_mode) || S_ISREG (loc->inode->st_mode)) + send_fop_to_all = 1; + + if (!send_fop_to_all) { + STACK_WIND (frame, + stripe_common_buf_cbk, + trav->xlator, + trav->xlator->fops->utimens, + loc, tv); + } else { + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = loc->inode; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->utimens, + loc, tv); + trav = trav->next; + } + } + return 0; +} + + +int32_t +stripe_first_rename_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + stripe_local_t *local = frame->local; + xlator_list_t *trav = this->children; + + if (op_ret == -1) + { + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; + } + + local->op_ret = 0; + local->stbuf = *buf; + local->call_count--; + trav = trav->next; /* Skip first child */ + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->rename, + &local->loc, &local->loc2); + trav = trav->next; + } + + return 0; +} +/** + * stripe_rename - + */ +int32_t +stripe_rename (call_frame_t *frame, + xlator_t *this, + loc_t *oldloc, + loc_t *newloc) +{ + stripe_private_t *priv = this->private; + stripe_local_t *local = NULL; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (oldloc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, EIO, NULL); + return 0; + } + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + local->inode = oldloc->inode; + loc_copy (&local->loc, oldloc); + loc_copy (&local->loc2, newloc); + + local->call_count = priv->child_count; + + frame->local = local; + + STACK_WIND (frame, + stripe_first_rename_cbk, + trav->xlator, + trav->xlator->fops->rename, + oldloc, newloc); + + return 0; +} + + +/** + * stripe_access - + */ +int32_t +stripe_access (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t mask) +{ + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + STACK_WIND (frame, + stripe_common_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->access, + loc, mask); + + return 0; +} + + +/** + * stripe_readlink_cbk - + */ +int32_t +stripe_readlink_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + const char *path) +{ + STACK_UNWIND (frame, op_ret, op_errno, path); + + return 0; +} + + +/** + * stripe_readlink - + */ +int32_t +stripe_readlink (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + size_t size) +{ + stripe_private_t *priv = this->private; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, ENOTCONN, NULL); + return 0; + } + + STACK_WIND (frame, + stripe_readlink_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readlink, + loc, size); + + return 0; +} + + +/** + * stripe_unlink - + */ +int32_t +stripe_unlink (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + int send_fop_to_all = 0; + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO); + return 0; + } + + if (S_ISDIR (loc->inode->st_mode) || S_ISREG (loc->inode->st_mode)) + send_fop_to_all = 1; + + if (!send_fop_to_all) { + STACK_WIND (frame, + stripe_common_cbk, + trav->xlator, + trav->xlator->fops->unlink, + loc); + } else { + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_cbk, + trav->xlator, + trav->xlator->fops->unlink, + loc); + trav = trav->next; + } + } + + return 0; +} + + +int32_t +stripe_first_rmdir_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + xlator_list_t *trav = this->children; + stripe_local_t *local = frame->local; + + if (op_ret == -1) + { + STACK_UNWIND (frame, op_ret, op_errno); + return 0; + } + + local->call_count--; /* First child successful */ + trav = trav->next; /* Skip first child */ + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_cbk, + trav->xlator, + trav->xlator->fops->rmdir, + &local->loc); + trav = trav->next; + } + + return 0; +} + +/** + * stripe_rmdir - + */ +int32_t +stripe_rmdir (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + stripe_local_t *local = NULL; + xlator_list_t *trav = this->children; + stripe_private_t *priv = this->private; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO); + return 0; + } + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = loc->inode; + loc_copy (&local->loc, loc); + local->call_count = priv->child_count; + + STACK_WIND (frame, + stripe_first_rmdir_cbk, + trav->xlator, + trav->xlator->fops->rmdir, + loc); + + return 0; +} + + +/** + * stripe_setxattr - + */ +int32_t +stripe_setxattr (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + dict_t *dict, + int32_t flags) +{ + stripe_private_t *priv = this->private; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, ENOTCONN); + return 0; + } + + STACK_WIND (frame, + stripe_common_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->setxattr, + loc, dict, flags); + + return 0; +} + + +int32_t +stripe_mknod_ifreg_fail_unlink_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + } + UNLOCK (&frame->lock); + + if (!callcnt) { + loc_wipe (&local->loc); + STACK_UNWIND (frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf); + } + + return 0; +} + + +/** + */ +int32_t +stripe_mknod_ifreg_setxattr_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_ret = -1; + local->op_errno = op_errno; + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->op_ret == -1) { + local->call_count = priv->child_count; + while (trav) { + STACK_WIND (frame, + stripe_mknod_ifreg_fail_unlink_cbk, + trav->xlator, + trav->xlator->fops->unlink, + &local->loc); + trav = trav->next; + } + return 0; + } + + loc_wipe (&local->loc); + STACK_UNWIND (frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf); + } + return 0; +} + +/** + */ +int32_t +stripe_mknod_ifreg_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + inode_t *inode, + struct stat *buf) +{ + int ret = 0; + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + stripe_private_t *priv = this->private; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->failed = 1; + local->op_errno = op_errno; + } + + if (op_ret >= 0) { + local->op_ret = op_ret; + /* Get the mapping in inode private */ + /* Get the stat buf right */ + if (local->stbuf.st_blksize == 0) { + local->stbuf = *buf; + /* Because st_blocks gets added again */ + local->stbuf.st_blocks = 0; + } + + /* Always, pass the inode number of first child + to the above layer */ + if (FIRST_CHILD(this) == + ((call_frame_t *)cookie)->this) + local->stbuf.st_ino = buf->st_ino; + + local->stbuf.st_blocks += buf->st_blocks; + if (local->stbuf.st_size < buf->st_size) + local->stbuf.st_size = buf->st_size; + if (local->stbuf.st_blksize != buf->st_blksize) { + /* TODO: add to blocks in terms of + original block size */ + } + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->failed) + local->op_ret = -1; + + if ((local->op_ret != -1) && priv->xattr_supported) { + /* Send a setxattr request to nodes where the + files are created */ + int32_t index = 0; + char size_key[256] = {0,}; + char index_key[256] = {0,}; + char count_key[256] = {0,}; + xlator_list_t *trav = this->children; + dict_t *dict = NULL; + + sprintf (size_key, + "trusted.%s.stripe-size", this->name); + sprintf (count_key, + "trusted.%s.stripe-count", this->name); + sprintf (index_key, + "trusted.%s.stripe-index", this->name); + + local->call_count = priv->child_count; + + while (trav) { + dict = get_new_dict (); + dict_ref (dict); + /* TODO: check return value */ + ret = dict_set_int64 (dict, size_key, + local->stripe_size); + ret = dict_set_int32 (dict, count_key, + local->call_count); + ret = dict_set_int32 (dict, index_key, index); + + STACK_WIND (frame, + stripe_mknod_ifreg_setxattr_cbk, + trav->xlator, + trav->xlator->fops->setxattr, + &local->loc, dict, 0); + + dict_unref (dict); + index++; + trav = trav->next; + } + } else { + /* Create itself has failed.. so return + without setxattring */ + loc_wipe (&local->loc); + STACK_UNWIND (frame, local->op_ret, local->op_errno, + local->inode, &local->stbuf); + } + } + + return 0; +} + + +/** + * stripe_mknod - + */ +int32_t +stripe_mknod (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + mode_t mode, + dev_t rdev) +{ + stripe_private_t *priv = this->private; + stripe_local_t *local = NULL; + xlator_list_t *trav = NULL; + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO, NULL, NULL); + return 0; + } + + if (S_ISREG(mode)) { + /* NOTE: on older kernels (older than 2.6.9), + creat() fops is sent as mknod() + open(). Hence handling + S_IFREG files is necessary */ + if (priv->nodes_down) { + gf_log (this->name, GF_LOG_WARNING, + "Some node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO, loc->inode, NULL); + return 0; + } + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + local->op_errno = ENOTCONN; + local->stripe_size = stripe_get_matching_bs (loc->path, + priv->pattern, + priv->block_size); + frame->local = local; + local->inode = loc->inode; + loc_copy (&local->loc, loc); + + /* Everytime in stripe lookup, all child nodes should + be looked up */ + local->call_count = + ((stripe_private_t *)this->private)->child_count; + + trav = this->children; + while (trav) { + STACK_WIND (frame, + stripe_mknod_ifreg_cbk, + trav->xlator, + trav->xlator->fops->mknod, + loc, mode, rdev); + trav = trav->next; + } + + /* This case is handled, no need to continue further. */ + return 0; + } + + + STACK_WIND (frame, + stripe_common_inode_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->mknod, + loc, mode, rdev); + + return 0; +} + + +/** + * stripe_mkdir - + */ +int32_t +stripe_mkdir (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + mode_t mode) +{ + stripe_private_t *priv = this->private; + stripe_local_t *local = NULL; + xlator_list_t *trav = NULL; + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO, NULL, NULL); + return 0; + } + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + local->call_count = priv->child_count; + frame->local = local; + + /* Everytime in stripe lookup, all child nodes should be looked up */ + trav = this->children; + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_inode_cbk, + trav->xlator, + trav->xlator->fops->mkdir, + loc, mode); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_symlink - + */ +int32_t +stripe_symlink (call_frame_t *frame, + xlator_t *this, + const char *linkpath, + loc_t *loc) +{ + stripe_private_t *priv = this->private; + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO, NULL, NULL); + return 0; + } + + /* send symlink to only first node */ + STACK_WIND (frame, + stripe_common_inode_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->symlink, + linkpath, loc); + + return 0; +} + +/** + * stripe_link - + */ +int32_t +stripe_link (call_frame_t *frame, + xlator_t *this, + loc_t *oldloc, + loc_t *newloc) +{ + int send_fop_to_all = 0; + stripe_private_t *priv = this->private; + stripe_local_t *local = NULL; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (oldloc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO, NULL, NULL); + return 0; + } + + + if (S_ISREG (oldloc->inode->st_mode)) + send_fop_to_all = 1; + + if (!send_fop_to_all) { + STACK_WIND (frame, + stripe_common_inode_cbk, + trav->xlator, + trav->xlator->fops->link, + oldloc, newloc); + } else { + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->call_count = priv->child_count; + + /* Everytime in stripe lookup, all child + nodes should be looked up */ + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_inode_cbk, + trav->xlator, + trav->xlator->fops->link, + oldloc, newloc); + trav = trav->next; + } + } + + return 0; +} + +int32_t +stripe_create_fail_unlink_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + int32_t callcnt = 0; + fd_t *lfd = NULL; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + } + UNLOCK (&frame->lock); + + if (!callcnt) { + lfd = local->fd; + loc_wipe (&local->loc); + STACK_UNWIND (frame, local->op_ret, local->op_errno, + local->fd, local->inode, &local->stbuf); + fd_unref (lfd); + } + return 0; +} + + +/** + * stripe_create_setxattr_cbk - + */ +int32_t +stripe_create_setxattr_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + fd_t *lfd = NULL; + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_ret = -1; + local->op_errno = op_errno; + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->op_ret == -1) { + local->call_count = priv->child_count; + while (trav) { + STACK_WIND (frame, + stripe_create_fail_unlink_cbk, + trav->xlator, + trav->xlator->fops->unlink, + &local->loc); + trav = trav->next; + } + + return 0; + } + + lfd = local->fd; + loc_wipe (&local->loc); + STACK_UNWIND (frame, local->op_ret, local->op_errno, + local->fd, local->inode, &local->stbuf); + fd_unref (lfd); + } + + return 0; +} + +/** + * stripe_create_cbk - + */ +int32_t +stripe_create_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd, + inode_t *inode, + struct stat *buf) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + stripe_private_t *priv = this->private; + fd_t *lfd = NULL; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->failed = 1; + local->op_errno = op_errno; + } + + if (op_ret >= 0) { + local->op_ret = op_ret; + /* Get the mapping in inode private */ + /* Get the stat buf right */ + if (local->stbuf.st_blksize == 0) { + local->stbuf = *buf; + /* Because st_blocks gets added again */ + local->stbuf.st_blocks = 0; + } + + /* Always, pass the inode number of first + child to the above layer */ + if (FIRST_CHILD(this) == + ((call_frame_t *)cookie)->this) + local->stbuf.st_ino = buf->st_ino; + + local->stbuf.st_blocks += buf->st_blocks; + if (local->stbuf.st_size < buf->st_size) + local->stbuf.st_size = buf->st_size; + if (local->stbuf.st_blksize != buf->st_blksize) { + /* TODO: add to blocks in terms of + original block size */ + } + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->failed) + local->op_ret = -1; + + if (local->op_ret >= 0) { + fd_ctx_set (local->fd, this, local->stripe_size); + } + + if ((local->op_ret != -1) && + local->stripe_size && priv->xattr_supported) { + /* Send a setxattr request to nodes where + the files are created */ + int ret = 0; + int32_t index = 0; + char size_key[256] = {0,}; + char index_key[256] = {0,}; + char count_key[256] = {0,}; + xlator_list_t *trav = this->children; + dict_t *dict = NULL; + + sprintf (size_key, + "trusted.%s.stripe-size", this->name); + sprintf (count_key, + "trusted.%s.stripe-count", this->name); + sprintf (index_key, + "trusted.%s.stripe-index", this->name); + + local->call_count = priv->child_count; + + while (trav) { + dict = get_new_dict (); + dict_ref (dict); + + /* TODO: check return values */ + ret = dict_set_int64 (dict, size_key, + local->stripe_size); + ret = dict_set_int32 (dict, count_key, + local->call_count); + ret = dict_set_int32 (dict, index_key, index); + + STACK_WIND (frame, + stripe_create_setxattr_cbk, + trav->xlator, + trav->xlator->fops->setxattr, + &local->loc, + dict, + 0); + + dict_unref (dict); + index++; + trav = trav->next; + } + } else { + /* Create itself has failed.. so return + without setxattring */ + lfd = local->fd; + loc_wipe (&local->loc); + STACK_UNWIND (frame, local->op_ret, local->op_errno, + local->fd, local->inode, &local->stbuf); + + fd_unref (lfd); + } + } + + return 0; +} + + +/** + * stripe_create - If a block-size is specified for the 'name', create the + * file in all the child nodes. If not, create it in only first child. + * + * @name- complete path of the file to be created. + */ +int32_t +stripe_create (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags, + mode_t mode, + fd_t *fd) +{ + stripe_private_t *priv = this->private; + stripe_local_t *local = NULL; + xlator_list_t *trav = NULL; + + /* files created in O_APPEND mode does not allow lseek() on fd */ + flags &= ~O_APPEND; + + if (priv->first_child_down || priv->nodes_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO, fd, loc->inode, NULL); + return 0; + } + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + local->op_errno = ENOTCONN; + local->stripe_size = stripe_get_matching_bs (loc->path, + priv->pattern, + priv->block_size); + frame->local = local; + local->inode = loc->inode; + loc_copy (&local->loc, loc); + local->fd = fd_ref (fd); + + local->call_count = ((stripe_private_t *)this->private)->child_count; + + trav = this->children; + while (trav) { + STACK_WIND (frame, + stripe_create_cbk, + trav->xlator, + trav->xlator->fops->create, + loc, flags, mode, fd); + trav = trav->next; + } + + return 0; +} + +/** + * stripe_open_cbk - + */ +int32_t +stripe_open_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + local->failed = 1; + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_ret = -1; + local->op_errno = op_errno; + } + + if (op_ret >= 0) + local->op_ret = op_ret; + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->failed) + local->op_ret = -1; + + if (local->op_ret >= 0) { + fd_ctx_set (local->fd, this, local->stripe_size); + } + loc_wipe (&local->loc); + STACK_UNWIND (frame, local->op_ret, local->op_errno, fd); + } + + return 0; +} + + +/** + * stripe_getxattr_cbk - + */ +int32_t +stripe_open_getxattr_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + dict_t *dict) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + xlator_list_t *trav = this->children; + stripe_private_t *priv = this->private; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_ret = -1; + local->op_errno = op_errno; + if (op_errno == ENOTCONN) + local->failed = 1; + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (!local->failed && (local->op_ret != -1)) { + /* If getxattr doesn't fails, call open */ + char size_key[256] = {0,}; + data_t *stripe_size_data = NULL; + + sprintf (size_key, + "trusted.%s.stripe-size", this->name); + stripe_size_data = dict_get (dict, size_key); + + if (stripe_size_data) { + local->stripe_size = + data_to_int64 (stripe_size_data); + /* + if (local->stripe_size != priv->block_size) { + gf_log (this->name, GF_LOG_WARNING, + "file(%s) is having different " + "block-size", local->loc.path); + } + */ + } else { + /* if the file was created using earlier + versions of stripe */ + gf_log (this->name, GF_LOG_CRITICAL, + "[CRITICAL] Seems like file(%s) " + "created using earlier version", + local->loc.path); + } + } + + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_open_cbk, + trav->xlator, + trav->xlator->fops->open, + &local->loc, local->flags, local->fd); + trav = trav->next; + } + } + + return 0; +} + +/** + * stripe_open - + */ +int32_t +stripe_open (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags, + fd_t *fd) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + /* files opened in O_APPEND mode does not allow lseek() on fd */ + flags &= ~O_APPEND; + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, ENOTCONN, NULL); + return 0; + } + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->fd = fd; + frame->local = local; + local->inode = loc->inode; + loc_copy (&local->loc, loc); + + /* Striped files */ + local->flags = flags; + local->call_count = priv->child_count; + local->stripe_size = stripe_get_matching_bs (loc->path, + priv->pattern, + priv->block_size); + + if (priv->xattr_supported) { + while (trav) { + STACK_WIND (frame, + stripe_open_getxattr_cbk, + trav->xlator, + trav->xlator->fops->getxattr, + loc, NULL); + trav = trav->next; + } + } else { + while (trav) { + STACK_WIND (frame, + stripe_open_cbk, + trav->xlator, + trav->xlator->fops->open, + &local->loc, local->flags, local->fd); + trav = trav->next; + } + } + + return 0; +} + +/** + * stripe_opendir_cbk - + */ +int32_t +stripe_opendir_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_ret = -1; + local->failed = 1; + local->op_errno = op_errno; + } + + if (op_ret >= 0) + local->op_ret = op_ret; + } + UNLOCK (&frame->lock); + + if (!callcnt) { + STACK_UNWIND (frame, local->op_ret, + local->op_errno, local->fd); + } + + return 0; +} + + +/** + * stripe_opendir - + */ +int32_t +stripe_opendir (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + fd_t *fd) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning EIO"); + STACK_UNWIND (frame, -1, EIO, NULL); + return 0; + } + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + frame->local = local; + local->inode = loc->inode; + local->fd = fd; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_opendir_cbk, + trav->xlator, + trav->xlator->fops->opendir, + loc, fd); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_getxattr_cbk - + */ +int32_t +stripe_getxattr_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + dict_t *value) +{ + STACK_UNWIND (frame, op_ret, op_errno, value); + return 0; +} + + +/** + * stripe_getxattr - + */ +int32_t +stripe_getxattr (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + const char *name) +{ + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + STACK_WIND (frame, + stripe_getxattr_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->getxattr, + loc, name); + + return 0; +} + +/** + * stripe_removexattr - + */ +int32_t +stripe_removexattr (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + const char *name) +{ + stripe_private_t *priv = this->private; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (loc); + + if (priv->first_child_down) { + gf_log (this->name, GF_LOG_WARNING, + "First node down, returning ENOTCONN"); + STACK_UNWIND (frame, -1, ENOTCONN, NULL); + return 0; + } + + STACK_WIND (frame, + stripe_common_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->removexattr, + loc, name); + + return 0; +} + + +/** + * stripe_lk_cbk - + */ +int32_t +stripe_lk_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct flock *lock) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + + LOCK (&frame->lock); + { + callcnt = --local->call_count; + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_errno = op_errno; + if (op_errno == ENOTCONN) + local->failed = 1; + } + if (op_ret == 0 && local->op_ret == -1) { + /* First successful call, copy the *lock */ + local->op_ret = 0; + local->lock = *lock; + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + if (local->failed) + local->op_ret = -1; + STACK_UNWIND (frame, local->op_ret, + local->op_errno, &local->lock); + } + return 0; +} + + +/** + * stripe_lk - + */ +int32_t +stripe_lk (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t cmd, + struct flock *lock) +{ + stripe_local_t *local = NULL; + xlator_list_t *trav = this->children; + stripe_private_t *priv = this->private; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_lk_cbk, + trav->xlator, + trav->xlator->fops->lk, + fd, cmd, lock); + trav = trav->next; + } + + return 0; +} + +/** + * stripe_writedir - + */ +int32_t +stripe_setdents (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t flags, + dir_entry_t *entries, + int32_t count) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_cbk, + trav->xlator, + trav->xlator->fops->setdents, + fd, flags, entries, count); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_flush - + */ +int32_t +stripe_flush (call_frame_t *frame, + xlator_t *this, + fd_t *fd) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_cbk, + trav->xlator, + trav->xlator->fops->flush, + fd); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_close - + */ +int32_t +stripe_release (xlator_t *this, + fd_t *fd) +{ + return 0; +} + + +/** + * stripe_fsync - + */ +int32_t +stripe_fsync (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t flags) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_cbk, + trav->xlator, + trav->xlator->fops->fsync, + fd, flags); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_fstat - + */ +int32_t +stripe_fstat (call_frame_t *frame, + xlator_t *this, + fd_t *fd) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = fd->inode; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->fstat, + fd); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_fchmod - + */ +int32_t +stripe_fchmod (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + mode_t mode) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = fd->inode; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->fchmod, + fd, mode); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_fchown - + */ +int32_t +stripe_fchown (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + uid_t uid, + gid_t gid) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = fd->inode; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->fchown, + fd, uid, gid); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_ftruncate - + */ +int32_t +stripe_ftruncate (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + off_t offset) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->inode = fd->inode; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_buf_cbk, + trav->xlator, + trav->xlator->fops->ftruncate, + fd, offset); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_releasedir - + */ +int32_t +stripe_releasedir (xlator_t *this, + fd_t *fd) +{ + return 0; +} + + +/** + * stripe_fsyncdir - + */ +int32_t +stripe_fsyncdir (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t flags) +{ + stripe_local_t *local = NULL; + stripe_private_t *priv = this->private; + xlator_list_t *trav = this->children; + + STRIPE_CHECK_INODE_CTX_AND_UNWIND_ON_ERR (fd); + + /* Initialization */ + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->op_ret = -1; + frame->local = local; + local->call_count = priv->child_count; + + while (trav) { + STACK_WIND (frame, + stripe_stack_unwind_cbk, + trav->xlator, + trav->xlator->fops->fsyncdir, + fd, + flags); + trav = trav->next; + } + + return 0; +} + + +/** + * stripe_single_readv_cbk - This function is used as return fn, when the + * file name doesn't match the pattern specified for striping. + */ +int32_t +stripe_single_readv_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct iovec *vector, + int32_t count, + struct stat *stbuf) +{ + STACK_UNWIND (frame, op_ret, op_errno, vector, count, stbuf); + return 0; +} + +/** + * stripe_readv_cbk - get all the striped reads, and order it properly, send it + * to above layer after putting it in a single vector. + */ +int32_t +stripe_readv_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct iovec *vector, + int32_t count, + struct stat *stbuf) +{ + int32_t index = 0; + int32_t callcnt = 0; + call_frame_t *main_frame = NULL; + stripe_local_t *main_local = NULL; + stripe_local_t *local = frame->local; + + index = local->node_index; + main_frame = local->orig_frame; + main_local = main_frame->local; + + LOCK (&main_frame->lock); + { + main_local->replies[index].op_ret = op_ret; + main_local->replies[index].op_errno = op_errno; + if (op_ret >= 0) { + main_local->replies[index].stbuf = *stbuf; + main_local->replies[index].count = count; + main_local->replies[index].vector = + iov_dup (vector, count); + + if (frame->root->rsp_refs) + dict_copy (frame->root->rsp_refs, + main_frame->root->rsp_refs); + } + callcnt = ++main_local->call_count; + } + UNLOCK(&main_frame->lock); + + if (callcnt == main_local->wind_count) { + int32_t final_count = 0; + struct iovec *final_vec = NULL; + struct stat tmp_stbuf = {0,}; + dict_t *refs = main_frame->root->rsp_refs; + + op_ret = 0; + memcpy (&tmp_stbuf, &main_local->replies[0].stbuf, + sizeof (struct stat)); + for (index=0; index < main_local->wind_count; index++) { + /* TODO: check whether each stripe returned 'expected' + * number of bytes + */ + if (main_local->replies[index].op_ret == -1) { + op_ret = -1; + op_errno = main_local->replies[index].op_errno; + break; + } + op_ret += main_local->replies[index].op_ret; + final_count += main_local->replies[index].count; + /* TODO: Do I need to send anything more in stbuf? */ + if (tmp_stbuf.st_size < + main_local->replies[index].stbuf.st_size) { + tmp_stbuf.st_size = + main_local->replies[index].stbuf.st_size; + } + } + if (op_ret != -1) { + final_vec = CALLOC (final_count, + sizeof (struct iovec)); + ERR_ABORT (final_vec); + final_count = 0; + + for (index=0; + index < main_local->wind_count; index++) { + memcpy (final_vec + final_count, + main_local->replies[index].vector, + (main_local->replies[index].count * + sizeof (struct iovec))); + final_count += + main_local->replies[index].count; + + free (main_local->replies[index].vector); + } + } else { + final_vec = NULL; + final_count = 0; + } + /* */ + FREE (main_local->replies); + refs = main_frame->root->rsp_refs; + STACK_UNWIND (main_frame, op_ret, op_errno, + final_vec, final_count, &tmp_stbuf); + + dict_unref (refs); + if (final_vec) + free (final_vec); + } + + STACK_DESTROY (frame->root); + return 0; +} + +/** + * stripe_readv - + */ +int32_t +stripe_readv (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + size_t size, + off_t offset) +{ + int32_t index = 0; + int32_t num_stripe = 0; + size_t frame_size = 0; + off_t rounded_end = 0; + uint64_t stripe_size = 0; + off_t rounded_start = 0; + off_t frame_offset = offset; + stripe_local_t *local = NULL; + call_frame_t *rframe = NULL; + stripe_local_t *rlocal = NULL; + xlator_list_t *trav = this->children; + stripe_private_t *priv = this->private; + + fd_ctx_get (fd, this, &stripe_size); + if (!stripe_size) { + STACK_UNWIND (frame, -1, EINVAL, NULL, 0, NULL); + return 0; + } + + /* The file is stripe across the child nodes. Send the read request + * to the child nodes appropriately after checking which region of + * the file is in which child node. Always '0-<stripe_size>' part of + * the file resides in the first child. + */ + rounded_start = floor (offset, stripe_size); + rounded_end = roof (offset+size, stripe_size); + num_stripe = (rounded_end - rounded_start) / stripe_size; + + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + local->wind_count = num_stripe; + frame->local = local; + frame->root->rsp_refs = dict_ref (get_new_dict ()); + + /* This is where all the vectors should be copied. */ + local->replies = CALLOC (1, num_stripe * + sizeof (struct readv_replies)); + ERR_ABORT (local->replies); + + for (index = 0; + index < ((offset / stripe_size) % priv->child_count); + index++) { + trav = trav->next; + } + + for (index = 0; index < num_stripe; index++) { + rframe = copy_frame (frame); + rlocal = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (rlocal); + + frame_size = min (roof (frame_offset+1, stripe_size), + (offset + size)) - frame_offset; + + rlocal->node_index = index; + rlocal->orig_frame = frame; + rframe->local = rlocal; + STACK_WIND (rframe, + stripe_readv_cbk, + trav->xlator, + trav->xlator->fops->readv, + fd, frame_size, frame_offset); + + frame_offset += frame_size; + + trav = trav->next ? trav->next : this->children; + } + + return 0; +} + + +/** + * stripe_writev_cbk - + */ +int32_t +stripe_writev_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *stbuf) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + LOCK(&frame->lock); + { + callcnt = ++local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_errno = op_errno; + local->op_ret = -1; + } + if (op_ret >= 0) { + local->op_ret += op_ret; + local->stbuf = *stbuf; + } + } + UNLOCK (&frame->lock); + + if ((callcnt == local->wind_count) && local->unwind) { + STACK_UNWIND (frame, local->op_ret, + local->op_errno, &local->stbuf); + } + return 0; +} + + +/** + * stripe_single_writev_cbk - + */ +int32_t +stripe_single_writev_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *stbuf) +{ + STACK_UNWIND (frame, op_ret, op_errno, stbuf); + return 0; +} +/** + * stripe_writev - + */ +int32_t +stripe_writev (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + struct iovec *vector, + int32_t count, + off_t offset) +{ + int32_t idx = 0; + int32_t total_size = 0; + int32_t offset_offset = 0; + int32_t remaining_size = 0; + int32_t tmp_count = count; + off_t fill_size = 0; + uint64_t stripe_size = 0; + struct iovec *tmp_vec = vector; + stripe_private_t *priv = this->private; + stripe_local_t *local = NULL; + xlator_list_t *trav = NULL; + + fd_ctx_get (fd, this, &stripe_size); + if (!stripe_size) { + STACK_UNWIND (frame, -1, EINVAL, NULL); + return 0; + } + + /* File has to be stripped across the child nodes */ + for (idx = 0; idx< count; idx ++) { + total_size += tmp_vec[idx].iov_len; + } + remaining_size = total_size; + + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + frame->local = local; + local->stripe_size = stripe_size; + + while (1) { + /* Send striped chunk of the vector to child + nodes appropriately. */ + trav = this->children; + + idx = (((offset + offset_offset) / + local->stripe_size) % priv->child_count); + while (idx) { + trav = trav->next; + idx--; + } + fill_size = (local->stripe_size - + ((offset + offset_offset) % local->stripe_size)); + if (fill_size > remaining_size) + fill_size = remaining_size; + + remaining_size -= fill_size; + + tmp_count = iov_subset (vector, count, offset_offset, + offset_offset + fill_size, NULL); + tmp_vec = CALLOC (tmp_count, sizeof (struct iovec)); + ERR_ABORT (tmp_vec); + tmp_count = iov_subset (vector, count, offset_offset, + offset_offset + fill_size, tmp_vec); + + local->wind_count++; + if (remaining_size == 0) + local->unwind = 1; + + STACK_WIND(frame, + stripe_writev_cbk, + trav->xlator, + trav->xlator->fops->writev, + fd, tmp_vec, tmp_count, offset + offset_offset); + FREE (tmp_vec); + offset_offset += fill_size; + if (remaining_size == 0) + break; + } + + return 0; +} + + + +/* Management operations */ + +/** + * stripe_stats_cbk - Add all the fields received from different clients. + * Once all the clients return, send stats to above layer. + * + */ +int32_t +stripe_stats_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct xlator_stats *stats) +{ + int32_t callcnt = 0; + stripe_local_t *local = frame->local; + + LOCK(&frame->lock); + { + callcnt = --local->call_count; + + if (op_ret == -1) { + gf_log (this->name, GF_LOG_WARNING, + "%s returned error %s", + ((call_frame_t *)cookie)->this->name, + strerror (op_errno)); + local->op_ret = -1; + local->op_errno = op_errno; + } + if (op_ret == 0) { + if (local->op_ret == -2) { + /* This is to make sure this is the + first time */ + local->stats = *stats; + local->op_ret = 0; + } else { + local->stats.nr_files += stats->nr_files; + local->stats.free_disk += stats->free_disk; + local->stats.disk_usage += stats->disk_usage; + local->stats.nr_clients += stats->nr_clients; + } + } + } + UNLOCK (&frame->lock); + + if (!callcnt) { + STACK_UNWIND (frame, local->op_ret, local->op_errno, + &local->stats); + } + + return 0; +} + +/** + * stripe_stats - + */ +int32_t +stripe_stats (call_frame_t *frame, + xlator_t *this, + int32_t flags) +{ + stripe_local_t *local = NULL; + xlator_list_t *trav = this->children; + + local = CALLOC (1, sizeof (stripe_local_t)); + ERR_ABORT (local); + frame->local = local; + local->op_ret = -2; /* to be used as a flag in _cbk */ + local->call_count = ((stripe_private_t*)this->private)->child_count; + while (trav) { + STACK_WIND (frame, + stripe_stats_cbk, + trav->xlator, + trav->xlator->mops->stats, + flags); + trav = trav->next; + } + return 0; +} + +/** + * notify + */ +int32_t +notify (xlator_t *this, + int32_t event, + void *data, + ...) +{ + stripe_private_t *priv = this->private; + int down_client = 0; + int i = 0; + + if (!priv) + return 0; + + switch (event) + { + case GF_EVENT_CHILD_UP: + { + /* get an index number to set */ + for (i = 0; i < priv->child_count; i++) { + if (data == priv->xl_array[i]) + break; + } + priv->state[i] = 1; + for (i = 0; i < priv->child_count; i++) { + if (!priv->state[i]) + down_client++; + } + + LOCK (&priv->lock); + { + priv->nodes_down = down_client; + + if (data == FIRST_CHILD (this)) { + priv->first_child_down = 0; + default_notify (this, event, data); + } + } + UNLOCK (&priv->lock); + } + break; + case GF_EVENT_CHILD_DOWN: + { + /* get an index number to set */ + for (i = 0; i < priv->child_count; i++) { + if (data == priv->xl_array[i]) + break; + } + priv->state[i] = 0; + for (i = 0; i < priv->child_count; i++) { + if (!priv->state[i]) + down_client++; + } + + LOCK (&priv->lock); + { + priv->nodes_down = down_client; + + if (data == FIRST_CHILD (this)) { + priv->first_child_down = 1; + default_notify (this, event, data); + } + } + UNLOCK (&priv->lock); + } + break; + + default: + { + /* */ + default_notify (this, event, data); + } + break; + } + + return 0; +} +/** + * init - This function is called when xlator-graph gets initialized. + * The option given in volfiles are parsed here. + * @this - + */ +int32_t +init (xlator_t *this) +{ + stripe_private_t *priv = NULL; + xlator_list_t *trav = NULL; + data_t *data = NULL; + int32_t count = 0; + + trav = this->children; + while (trav) { + count++; + trav = trav->next; + } + + if (!count) { + gf_log (this->name, GF_LOG_ERROR, + "stripe configured without \"subvolumes\" option. " + "exiting"); + return -1; + } + + if (!this->parents) { + gf_log (this->name, GF_LOG_WARNING, + "dangling volume. check volfile "); + } + + priv = CALLOC (1, sizeof (stripe_private_t)); + ERR_ABORT (priv); + priv->xl_array = CALLOC (1, count * sizeof (xlator_t *)); + ERR_ABORT (priv->xl_array); + priv->child_count = count; + LOCK_INIT (&priv->lock); + + trav = this->children; + count = 0; + while (trav) { + priv->xl_array[count++] = trav->xlator; + trav = trav->next; + } + + if (count > 256) { + gf_log (this->name, GF_LOG_ERROR, + "maximum number of stripe subvolumes supported " + "is 256"); + return -1; + } + + priv->block_size = (128 * GF_UNIT_KB); + /* option stripe-pattern *avi:1GB,*pdf:4096 */ + data = dict_get (this->options, "block-size"); + if (!data) { + gf_log (this->name, GF_LOG_DEBUG, + "No \"option block-size <x>\" given, defaulting " + "to 128KB"); + } else { + char *tmp_str = NULL; + char *tmp_str1 = NULL; + char *dup_str = NULL; + char *stripe_str = NULL; + char *pattern = NULL; + char *num = NULL; + struct stripe_options *temp_stripeopt = NULL; + struct stripe_options *stripe_opt = NULL; + + /* Get the pattern for striping. + "option block-size *avi:10MB" etc */ + stripe_str = strtok_r (data->data, ",", &tmp_str); + while (stripe_str) { + dup_str = strdup (stripe_str); + stripe_opt = CALLOC (1, + sizeof (struct stripe_options)); + ERR_ABORT (stripe_opt); + pattern = strtok_r (dup_str, ":", &tmp_str1); + num = strtok_r (NULL, ":", &tmp_str1); + if (num && + (gf_string2bytesize (num, + &stripe_opt->block_size) + != 0)) { + gf_log (this->name, GF_LOG_ERROR, + "invalid number format \"%s\"", + num); + return -1; + } else if (!num && (gf_string2bytesize ( + pattern, + &stripe_opt->block_size) + != 0)) { + /* Possible that there is no pattern given */ + stripe_opt->block_size = (128 * GF_UNIT_KB); + pattern = "*"; + } + memcpy (stripe_opt->path_pattern, + pattern, strlen (pattern)); + + gf_log (this->name, GF_LOG_DEBUG, + "block-size : pattern %s : size %"PRId64, + stripe_opt->path_pattern, + stripe_opt->block_size); + + if (!priv->pattern) { + priv->pattern = stripe_opt; + } else { + temp_stripeopt = priv->pattern; + while (temp_stripeopt->next) + temp_stripeopt = temp_stripeopt->next; + temp_stripeopt->next = stripe_opt; + } + stripe_str = strtok_r (NULL, ",", &tmp_str); + } + } + + priv->xattr_supported = 1; + data = dict_get (this->options, "use-xattr"); + if (data) { + if (gf_string2boolean (data->data, + &priv->xattr_supported) == -1) { + gf_log (this->name, GF_LOG_ERROR, + "error setting hard check for extended " + "attribute"); + //return -1; + } + } + + /* notify related */ + priv->nodes_down = priv->child_count; + this->private = priv; + + return 0; +} + +/** + * fini - Free all the private variables + * @this - + */ +void +fini (xlator_t *this) +{ + stripe_private_t *priv = this->private; + struct stripe_options *prev = NULL; + struct stripe_options *trav = priv->pattern; + while (trav) { + prev = trav; + trav = trav->next; + FREE (prev); + } + FREE (priv->xl_array); + LOCK_DESTROY (&priv->lock); + FREE (priv); + return; +} + + +struct xlator_fops fops = { + .stat = stripe_stat, + .unlink = stripe_unlink, + .symlink = stripe_symlink, + .rename = stripe_rename, + .link = stripe_link, + .chmod = stripe_chmod, + .chown = stripe_chown, + .truncate = stripe_truncate, + .utimens = stripe_utimens, + .create = stripe_create, + .open = stripe_open, + .readv = stripe_readv, + .writev = stripe_writev, + .statfs = stripe_statfs, + .flush = stripe_flush, + .fsync = stripe_fsync, + .setxattr = stripe_setxattr, + .getxattr = stripe_getxattr, + .removexattr = stripe_removexattr, + .access = stripe_access, + .ftruncate = stripe_ftruncate, + .fstat = stripe_fstat, + .readlink = stripe_readlink, + .mkdir = stripe_mkdir, + .rmdir = stripe_rmdir, + .lk = stripe_lk, + .opendir = stripe_opendir, + .fsyncdir = stripe_fsyncdir, + .fchmod = stripe_fchmod, + .fchown = stripe_fchown, + .lookup = stripe_lookup, + .setdents = stripe_setdents, + .mknod = stripe_mknod, +}; + +struct xlator_mops mops = { + .stats = stripe_stats, +}; + +struct xlator_cbks cbks = { + .release = stripe_release, + .releasedir = stripe_releasedir +}; + + +struct volume_options options[] = { + { .key = {"block-size"}, + .type = GF_OPTION_TYPE_ANY + }, + { .key = {"use-xattr"}, + .type = GF_OPTION_TYPE_BOOL + }, + { .key = {NULL} }, +}; |