- 20 Aug, 2013 14 commits
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Zhi Yong Wu authored
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Zhi Yong Wu <wuzhy@linux.vnet.ibm.com> Reviewed-by:
Mark Tinguely <tinguely@sgi.com> Signed-off-by:
Ben Myers <bpm@sgi.com>
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Zhi Yong Wu authored
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Zhi Yong Wu authored
Follow up with xfs naming style. Signed-off-by:
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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Zhi Yong Wu authored
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- 15 Aug, 2013 8 commits
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Dave Chinner authored
When a transaction is cancelled and the buffer log item is clean in the transaction, the buffer log item is unconditionally freed. If the log item is in the AIL, however, this leads to a use after free condition as the item still has other users. In this case, xfs_buf_item_relse() should only be called on clean buffer items if the reference count has dropped to zero. This ensures only the last user frees the item. Signed-off-by:
Dave Chinner <dchinner@redhat.com> Reviewed-by:
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Dwight Engen authored
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Gao feng <gaofeng@cn.fujitsu.com> Signed-off-by:
Dwight Engen <dwight.engen@oracle.com> Signed-off-by:
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Dwight Engen authored
Check for CAP_SYS_ADMIN since the caller can truncate preallocated blocks from files they do not own nor have write access to. A more fine grained access check was considered: require the caller to specify their own uid/gid and to use inode_permission to check for write, but this would not catch the case of an inode not reachable via path traversal from the callers mount namespace. Add check for read-only filesystem to free eofblocks ioctl. Reviewed-by:
Brian Foster <bfoster@redhat.com> Reviewed-by:
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Dwight Engen authored
Have eofblocks ioctl convert uid_t to kuid_t into internal structure. Update internal filter matching to compare ids with kuid_t types. Reviewed-by:
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Dwight Engen authored
Use uint32 from init_user_ns for xfs internal uid/gid representation in xfs_icdinode, xfs_dqid_t. Reviewed-by:
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Dwight Engen authored
Use inode_capable() to check if SUID|SGID bits should be cleared to match similar check in inode_change_ok(). The check for CAP_LINUX_IMMUTABLE was not modified since all other file systems also check against init_user_ns rather than current_user_ns. Only allow changing of projid from init_user_ns. Reviewed-by:
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Dwight Engen authored
Change permission check for setting ACL to use inode_owner_or_capable() which will additionally allow a CAP_FOWNER user in a user namespace to be able to set an ACL on an inode covered by the user namespace mapping. Reviewed-by:
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Dwight Engen authored
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- 13 Aug, 2013 9 commits
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Dave Chinner authored
The xc_cil_lock is used for two purposes - to protect the CIL itself, and to protect the push/commit state and lists. These are two logically separate structures and operations, so can have their own locks. This means that pushing on the CIL and the commit wait ordering won't contend for a lock with other transactions that are completing concurrently. As the CIL insertion is the hottest path throught eh CIL, this is a big win. Signed-off-by:
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Dave Chinner authored
Now that all the log item preparation and formatting is done under the CIL lock, we can get rid of the intermediate log vector chain used to track items to be inserted into the CIL. We can already find all the items to be committed from the transaction handle, so as long as we attach the log vectors to the item before we insert the items into the CIL, we don't need to create a log vector chain to pass around. This means we can move all the item insertion code into and optimise it into a pair of simple passes across all the items in the transaction. The first pass does the formatting and accounting, the second inserts them all into the CIL. We keep this two pass split so that we can separate the CIL insertion - which must be done under the CIL spinlock - from the formatting. We could insert each item into the CIL with a single pass, but that massively increases the number of times we have to grab the CIL spinlock. It is much more efficient (and hence scalable) to do a batch operation and insert all objects in a single lock grab. Signed-off-by:
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Dave Chinner authored
Now that we have the size of the log vector that has been allocated, we can determine if we need to allocate a new log vector for formatting and insertion. We only need to allocate a new vector if it won't fit into the existing buffer. However, we need to hold the CIL context lock while we do this so that we can't race with a push draining the currently queued log vectors. It is safe to do this as long as we do GFP_NOFS allocation to avoid avoid memory allocation recursing into the filesystem. Hence we can safely overwrite the existing log vector on the CIL if it is large enough to hold all the dirty regions of the current item. Signed-off-by:
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Dave Chinner authored
Now that we have the size of the object before the formatting pass is called, we can allocation the log vector and it's buffer in a single allocation rather than two separate allocations. Store the size of the allocated buffer in the log vector so that we potentially avoid allocation for future modifications of the object. While touching this code, remove the IOP_FORMAT definition. Signed-off-by:
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Dave Chinner authored
To begin optimising the CIL commit process, we need to have IOP_SIZE return both the number of vectors and the size of the data pointed to by the vectors. This enables us to calculate the size ofthe memory allocation needed before the formatting step and reduces the number of memory allocations per item by one. While there, kill the IOP_SIZE macro. Signed-off-by:
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Eric Sandeen authored
xlog_find_tail() currently leaks a bp on one error path. There is no error target, so manually free the bp before returning the error. Found by Coverity. Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Reviewed-by:
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Eric Sandeen authored
xlog_find_zeroed() currently leaks a bp on one error path. Using the bp_err: target resolves this. Found by Coverity. Signed-off-by:
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Eric Sandeen authored
xfs_attr_node_addname()'s error handling tests whether it should free "state" in the out: error handling label: out: if (state) xfs_da_state_free(state); but an earlier free doesn't set state to NULL afterwards; this could lead to a double free. Fix it by setting state to NULL after it's freed. This was found by Coverity. Signed-off-by: -
Jie Liu authored
Replace roundup() with roundup_64() as we calculate min_logblks with 64-bit divisions. Hence, call roundup() will cause the following error while compiling a 32-bit kernel: fs/built-in.o: In function `xfs_log_calc_minimum_size': fs/xfs/xfs_log_rlimit.c:140: undefined reference to `__udivdi3' Reported-by:
Fengguang Wu <fengguang.wu@intel.com> Cc: Dave Chinner <dchinner@redhat.com> Signed-off-by:
Jie Liu <jeff.liu@oracle.com> Reviewed-by:
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- 12 Aug, 2013 9 commits
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Jie Liu authored
Validate log space during log mount stage, the underlying function will drop a warning message via syslog in critical level if the log space is too small or too large. [ dchinner: For CRC enable filesystems, abort the mounting of the filesystem as mkfs should never make a log too small for the given filesystem configuration. ] [ dchinner: make a note of the fact that the log size limits in block counts are in units of filesystem blocks, not basic blocks. ] Signed-off-by:
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Jie Liu authored
Add source files for xfs_log_rlimit.c The new file is used for log size calculations and validation shared with userspace. [dchinner: xfs_log_calc_max_attrsetm_res() does not modify the tr_attrsetm reservation, just calculates the maximum. ] [dchinner: rework loop in xfs_log_get_max_trans_res() ] Signed-off-by:
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Jie Liu authored
Refactor xlog_ticket_alloc() to extract a new helper, i.e. xfs_log_calc_unit_res(). This helper would be used to calculate the total log reservation size by adding extra log operation/transation headers for a new log ticket. Signed-off-by:
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Jie Liu authored
Get rid of all XFS_XXX_LOG_RES() macros since they are obsoleted now. Signed-off-by:
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Jie Liu authored
With the new xfs_trans_res structure has been introduced, the log reservation size, log count as well as log flags are pre-initialized at mount time. So it's time to refine xfs_trans_reserve() interface to be more neat. Also, introduce a new helper M_RES() to return a pointer to the mp->m_resv structure to simplify the input. Signed-off-by:
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Jie Liu authored
tr_writeid is defined at mp->m_resv structure, however, it does not really being used when it should be.. This patch changes it to tr_writeid to fetch the correct log reservation size. Signed-off-by:
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Jie Liu authored
A preparation step. For now fsync_ts transaction use the pre-calculated log reservation size of tr_swrite. This patch introduce a new item tr_fsyncts to mp->m_reservations structure so that we can fetch the log reservation value for it in a same manner to others. Signed-off-by:
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Jie Liu authored
Introduce a new structure xfs_trans_res to hold transaction reservation item info per log ticket. We also need to improve xfs_trans_resv_calc() by initializing the log count as well as log flags for permanent log reservation. Signed-off-by:
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Dave Chinner authored
The struct xfs_perag has many kernel-only definitions in it, requiring a __KERNEL__ guard so userspace can use it to. Move it to xfs_mount.h so that it it kernel-only, and let userspace redefine it's own version of the structure containing only what it needs. This gets rid of another __KERNEL__ check in the XFS header files. Signed-off-by:
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